EP4150741A1 - Gummitopf - Google Patents
GummitopfInfo
- Publication number
- EP4150741A1 EP4150741A1 EP21721948.4A EP21721948A EP4150741A1 EP 4150741 A1 EP4150741 A1 EP 4150741A1 EP 21721948 A EP21721948 A EP 21721948A EP 4150741 A1 EP4150741 A1 EP 4150741A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- positioning device
- bearing block
- electric motor
- rotor shaft
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/085—Structural association with bearings radially supporting the rotary shaft at only one end of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
- H02K2211/03—Machines characterised by circuit boards, e.g. pcb
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
- H02K7/145—Hand-held machine tool
Definitions
- the present invention relates to a positioning device for an electric motor and bearing block, the electric motor containing a rotor, a rotor shaft and a stator.
- the present invention also relates to an electric motor comprising a rotor, a rotor shaft and a stator, the electric motor being connectable to a bearing block.
- Modern machine tools such as hammer drills, saws, grinding devices or the like, contain an electric motor as a drive and for generating a torque.
- Electric motors are relatively complex devices in which numerous components are installed positioned in predetermined orientations with respect to one another.
- the construction of the electric motor should be kept as simple as possible in order to keep the costs and the assembly effort for the electric motor low.
- the object of the present invention is therefore to provide a positioning device for an electric motor and bearing block as well as an electric motor with which the above-mentioned problem can be solved.
- the object is achieved in particular by a positioning device for an electric motor and bearing block, the electric motor containing a rotor, a rotor shaft and a stator.
- the positioning device is at least partially made of an elastic material and is essentially pot-shaped with an interior space and can be positioned in a central recess of the bearing block for at least partially receiving a first end of the rotor shaft.
- the most precise possible alignment and positioning of the rotor shaft with respect to the bearing block can be achieved in a simple manner.
- at least one fixing device is included for receiving and holding a bearing for the first end of the rotor shaft. In this way, the alignment and positioning of the rotor shaft in relation to the bearing block can be further improved.
- the fixing device can each contain a clamping surface on an inner jacket surface and / or a stop element in the axial direction.
- At least one holding device is included for receiving and holding a Hall plate.
- the Hall plate can be releasably connected to the device in a precise positioning and a predetermined alignment of the Hall plate with respect to the rotor can be achieved.
- the holding device can each contain a first and / or second elevation in the axial direction, wherein the first and second elevations can have different axial lengths.
- an axially extending recess is included on an outer jacket surface for at least partially receiving and holding a line when the positioning device is located in the central recess of the bearing block. In this way it can be achieved that the line is routed at a predetermined point and is not inadvertently jammed between components.
- a dust protection cap may be included at a first end of the positioning device. In this way, the penetration of dust or other contaminants into the interior of the electric motor can be prevented in a simple manner.
- an electric motor containing a rotor, a rotor shaft and a stator, the electric motor being connectable to a bearing block.
- a positioning device is included, which is at least partially designed from an elastic material and essentially pot-like with an interior space and can be positioned in a central recess of the bearing block for at least partially receiving a first end of the rotor shaft.
- FIG. 1 a cross section through an electric motor with a stator, a rotor, a rotor shaft, a bearing block and a positioning device;
- FIG. 2 shows a perspective view of the positioning device with an underside and an interior
- FIG. 3 shows a perspective view of the positioning device, which shows an upper side and a dust protection cap of the positioning device;
- FIG. 4 shows a perspective view of the underside of the positioning device with a Hall board
- FIG. 5 shows a view from below of the positioning device with the Hall board
- FIG. 6 shows a perspective view of the positioning device, which shows the underside of the positioning device with a bearing
- FIG. 7 shows a view from below of the positioning device with the bearing
- FIG. 8 shows a cross section of the positioning device with the bearing
- FIG. 9 shows a perspective view of the positioning device with the Hall board and a line
- FIG. 10 is a sectional view of a lower end of the positioning device with the Hall board
- FIG. 11 shows a perspective view of an upper side of the positioning device in a central recess of the bearing block
- FIG. 12 shows a cross section through the positioning device in the central recess of the bearing block
- FIG. 13 shows a detailed view of the positioning device in the central recess of the bearing block with the line which runs through an opening in the bearing block
- FIG. 14 shows a cross section through the positioning device in the central recess of the bearing block together with the line.
- FIG. 1 a first end 1a of an electric motor 1 is shown.
- the electric motor 1 essentially contains a stator 2, a rotor 3, a rotor shaft 4, a Hall plate 5, a bearing block 6 and a positioning device 7.
- the electric motor 1 can be used as a drive for a machine tool and essentially serves to generate a torque.
- the torque generated can either be transmitted directly to a tool connected to a machine tool or to the tool with the aid of a gear unit. Neither the machine tool nor the tool are shown in the figures.
- the rotor 3 is non-rotatably connected to the rotor shaft 4 and is located in an interior space of the stator 2 in such a way that a first end 4a of the rotor shaft 4 protrudes out of the stator 2 in the direction A.
- the direction A is the axial direction of the electric motor 1.
- a second end of the rotor shaft 4 is not shown in the figures.
- the rotor shaft 4 is designed essentially as a cylindrical rod and is used to transmit a torque generated in the electric motor 1 to a transmission. The transmission is not shown in the figures.
- the bearing block 6 is essentially pot-shaped and has a central, circular recess 6a.
- the bearing block 6 serves to receive and hold the stator 2 and rotor 3.
- the bearing block 6 can in turn be connected to a housing of a machine tool. The machine tool is not shown in the figures.
- a first end 2a of the stator 2 is connected to the bearing block 6 in such a way that the first end 4a of the rotor shaft 4 protrudes into the central recess 6a of the bearing block 6.
- the positioning device 7 is essentially pot-shaped.
- the embodiment of the pot-shaped positioning device 7 shown in the figures contains a first end 7a, a second end 7b, an inner circumferential surface 7c, an outer circumferential surface 7d, an upper ring element 8a, a lower ring element 8b and six carrier elements 9.
- the positioning device 7 is made of an elastic material.
- the elastic material can be rubber, for example.
- the positioning device 7 can also be referred to as a rubber pot.
- the six carrier elements 9 are arranged circularly at regular intervals and connect the lower ring element 8b to the upper ring element 8a.
- the upper ring element 8a is at the first end 7a and the lower ring element 8b is at the second end 7b of the Positioning device 7 is provided.
- the lower ring element 8b has a larger diameter than the upper ring element 8a.
- the positioning device 7 is thus shaped conically or as a truncated cone.
- more or less than six support elements 9 can be included. It is also possible that instead of the individual carrier elements 9, a continuous jacket surface is included. Each support element 9 includes an upper end 9a and a lower end 9b. The upper end 9a of each carrier element 9 is firmly connected to the upper ring element 8a and the lower end 9b of each carrier element 9 is in turn firmly connected to the lower ring element 8b. The carrier elements 9 extend in the direction A. An opening is provided between the individual carrier elements 9. The five of the six support elements 9 are designed almost identically. As will be described in detail later, one of the six support elements 9 on the outer jacket surface contains an axially extending recess 10 for receiving and holding a line 11.
- the axially extending recess 10 can also be referred to as an indentation or notch.
- the line 11 can in turn also be referred to as a stranded wire and connects the Hall plate 5 to a control device of the electric motor 1 or the machine tool.
- the Hall board 5 contains three Hall sensors 12 on an underside 5a, see FIG 12 detected position data are sent from the Hall plate 5 to the control device.
- the control device is not shown in the figures.
- the lower ring element 7b contains a holding device 13 for receiving and holding the Hall board 5.
- the Hall board 5 is a board (also called a printed circuit board) with the multiple Hall sensors 12.
- the holding device 13 shown in the present exemplary embodiment contains two high fixing elements 14 and four low alignment elements 15.
- the fixing elements 14 and the alignment elements 15 are each positioned opposite one another.
- the low alignment elements 15 are less than half as high as high elevations 14. Each of the elevations extends in the direction A.
- the ring-shaped Hall plate 5 has two recesses 16 lying opposite one another.
- the two fixing elements 14 are guided through the two recesses 16 so that the Hall plate 5 is releasably connected to the lower ring element 8b.
- the positioning device 7 consists of an elastic material, the two fixing elements 14 can be elastically deformed in order to fit into the recesses 16 to be introduced.
- the four alignment elements 15 protrude into correspondingly shaped recesses 16 in the Hall plate 5, see FIG. 10.
- the positioning device 7 on the inner circumferential surface 7c contains a fixing device 17 for receiving and holding a bearing 18 for the first end 4a of the rotor shaft 4.
- the bearing 18 is designed as a ball bearing.
- the fixing device 17 contains six shoulders 17a and six positioning surfaces 17b.
- Each carrier element 9 contains a shoulder 17a and a positioning surface 17b.
- the shoulder 17a can also be referred to as a projection.
- Each of the lugs 17a contains a support surface.
- the positioning surface 17b is positioned in the direction B and above each shoulder 17a on the inner circumferential surface 7c.
- the bearing 18 When the bearing 18 is positioned in the interior IR of the positioning device 7, the bearing 18 rests on each of the shoulders 17a in direction A and rests on each of the positioning surfaces 17b, see FIGS. 6 and 8. Because the positioning device 7 is elastic is, the carrier elements 9 deform a little elastically in a radial direction C when the bearing 18 is inserted into the interior space IR of the positioning device 7. As indicated in FIG. 8, the bearing 18 displaces an area D on the inner circumferential surface 7c of the positioning device 7. In other words: in the area D the material of the positioning device 7 is elastically deformed or squeezed. Due to the elastic deformation of the carrier elements 9, the bearing 18 is positioned relatively firmly or immovably in the positioning device 7.
- a circular dust protection cap 19 is contained at the first end 7a of the positioning device 7.
- the dust protection cap 19 closes the central opening of the upper ring element 8a and thereby protects, in direction B, the interior space IR of the positioning device 7 from ingress of dust and other contamination.
- one of the six support elements 9 has an axially extending recess 10 on the outer jacket wall for receiving and holding the line 11.
- the lower ring element 8b contains a recess 20.
- the recess 20 on the lower ring element 8b is positioned in the direction B below the recess 10 on the carrier element 9.
- the recess 20 on the lower ring element 8b serves to receive a plug 21 at the end of the line 11 which connects the Hall board 5 to the control device, see FIG. 4.
- Figure 1 shows a portion of the electric motor in an assembled state.
- the rotor shaft 4 is connected to the rotor 3 in a rotationally test.
- the rotor 3 and the rotor shaft 4 are rotatably positioned within the stator 2.
- the bearing 18 is, as described above, in the interior IR of the positioning device 7, see Figure 8.
- the positioning device 7 is positioned in the bearing block 18 that the first end of the rotor shaft 4 protrudes into the interior IR of the positioning device 7 and
- the first end 4a of the rotor shaft 4 is mounted in the bearing 18, see FIG. 1.
- the dust protection cap 19 at the first end 7a of the positioning device 7 protrudes slightly beyond the bearing block 6 in the direction A, see FIG. 14.
- the line 11 is connected to the plug 21 at one end. As shown in FIG. 9, the plug 21 is plugged into the Hall board 5. The plug 21 is thus located within the recess of the lower ring element 8b. The line 11 extends from the plug 21 in direction A, so that the line 11 is in the notch-shaped recess 10 on the carrier element 9. Because the line 11 is located in the axially extending recess 10, the outer diameter of the positioning device 7 is not enlarged by the line resting on the outer jacket surface.
- the positioning device 7 When the positioning device 7 is positioned together with the line 11 in the bearing block 6, the line 11 lies between the bearing block 6 and the positioning device 7, see FIG Positioning device 7 clamped, which can prevent the line 11 from moving unintentionally or even becoming detached from the Hall plate 5.
- the bearing block 6 contains an additional opening 22 on the upper side, see FIG. 11.
- the opening 22 is used to enable the line 11 to be guided out of the bearing block 6 from the positioning device 7 located in the bearing block 6.
- the diameter of the opening 22 corresponds to the diameter of the line 11, so that the line 11 can close the opening 22 against the ingress of dust.
- the line 11 is held or supported by the opening 22 in the bearing block 6 and / or the stator 2.
- the positioning device 7 can be made partially from elastic material.
- the carrier elements 9 or the upper and / or lower ring elements 8a, 8b may consist of the elastic material.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Brushless Motors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20174382.0A EP3910763A1 (de) | 2020-05-13 | 2020-05-13 | Gummitopf |
| PCT/EP2021/061533 WO2021228600A1 (de) | 2020-05-13 | 2021-05-03 | Gummitopf |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4150741A1 true EP4150741A1 (de) | 2023-03-22 |
| EP4150741C0 EP4150741C0 (de) | 2026-01-21 |
| EP4150741B1 EP4150741B1 (de) | 2026-01-21 |
Family
ID=70682758
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20174382.0A Withdrawn EP3910763A1 (de) | 2020-05-13 | 2020-05-13 | Gummitopf |
| EP21721948.4A Active EP4150741B1 (de) | 2020-05-13 | 2021-05-03 | Gummitopf |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20174382.0A Withdrawn EP3910763A1 (de) | 2020-05-13 | 2020-05-13 | Gummitopf |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US12587062B2 (de) |
| EP (2) | EP3910763A1 (de) |
| CN (1) | CN115398781B (de) |
| WO (1) | WO2021228600A1 (de) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3681038B2 (ja) * | 1998-10-19 | 2005-08-10 | 三菱電機株式会社 | 外転形電動機 |
| DE19949755A1 (de) * | 1999-10-15 | 2001-04-26 | Bosch Gmbh Robert | Handwerkzeugmaschine |
| JP3575359B2 (ja) * | 1999-12-09 | 2004-10-13 | 株式会社デンソー | 回転電機 |
| JP3097749U (ja) | 2003-05-13 | 2004-02-05 | 建準電機工業股▲分▼有限公司 | 主軸モーターの軸受の位置決め構造 |
| ATE367678T1 (de) * | 2003-09-19 | 2007-08-15 | Dyson Technology Ltd | Rotorbaugruppe |
| JP5110809B2 (ja) | 2006-06-23 | 2012-12-26 | セイコーインスツル株式会社 | 電動モータ及び電子機器 |
| DE102006035387B4 (de) * | 2006-10-31 | 2015-10-15 | Hilti Aktiengesellschaft | Elektrohandwerkzeugmaschine mit vibrationsgedämpfter Rotorwellenlagerung |
| FR2918221B1 (fr) * | 2007-06-29 | 2009-12-25 | Skf Ab | Systeme de support d'arbre pour moteur electrique, moteur electrique et procede de montage. |
| EP2195910B1 (de) * | 2007-08-28 | 2019-05-15 | SEW-EURODRIVE GmbH & Co. KG | Elektromotor mit winkelsensor |
| CN205509744U (zh) * | 2016-03-24 | 2016-08-24 | 苏州市润豪电机有限公司 | 高速电机的轴承减震装置 |
| DE102018205099A1 (de) * | 2017-05-19 | 2018-11-22 | Robert Bosch Gmbh | Elektrische Maschine sowie Verfahren zum Herstellen einer elektrischen Maschine |
| GB2559441A (en) | 2017-09-15 | 2018-08-08 | De Innovation Lab Ltd | Electrical motor arrangement for electrical vehicles |
-
2020
- 2020-05-13 EP EP20174382.0A patent/EP3910763A1/de not_active Withdrawn
-
2021
- 2021-05-03 CN CN202180027262.5A patent/CN115398781B/zh active Active
- 2021-05-03 WO PCT/EP2021/061533 patent/WO2021228600A1/de not_active Ceased
- 2021-05-03 EP EP21721948.4A patent/EP4150741B1/de active Active
- 2021-05-03 US US17/919,377 patent/US12587062B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US20230198336A1 (en) | 2023-06-22 |
| EP3910763A1 (de) | 2021-11-17 |
| EP4150741C0 (de) | 2026-01-21 |
| US12587062B2 (en) | 2026-03-24 |
| CN115398781A (zh) | 2022-11-25 |
| WO2021228600A1 (de) | 2021-11-18 |
| EP4150741B1 (de) | 2026-01-21 |
| CN115398781B (zh) | 2026-01-23 |
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